IP and Networking Basics


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Table of Contents

IP and Networking Basics


Origins of TCP/IP

Distributed Network Design

Simplified view of the Internet

What internetworks are

A small internetwork, or “internet”

The unifying effect of the network layer

OSI Stack & TCP/IP Architecture

Open Systems & TCP/IP

Layered Model Concept

OSI Model

Frame, Datagram, Segment, Packet

Layer 7, 6, 5

Layer 4

Layer 3

Layer 3

Layer 3

Layer 2

Layer 1


Protocol Layers: The TCP/IP Hourglass Model

Layer interaction

Layer interaction: OSI 7-layer model

Layer interaction: TCP/IP Model

Encapsulation & Decapsulation

Layer 2 - Ethernet frame

Layer 3 - IP datagram

Layer 4 - TCP segment

IP Addressing

Purpose of an IP address

Purpose of an IP Address

Basic Structure of an IP Address

Address Exercise

Address Exercise

Addressing in Internetworks

Address Structure Revisited

Network Masks

Example Prefixes

Special Addresses

Allocating IP Addresses

More Address Exercises

More levels of address hierarchy

Old-style classes of IP addresses

Old-style classes of IP addresses

Implied netmasks of classful addresses

Traditional subnetting of classful networks

Traditional supernetting

Classless addressing

Classless Addressing

Grouping of decimal numbers

Grouping of binary numbers

Grouping of binary numbers

Classless addressing example

Classless addressing exercise

Large Network Issues & Routers

Large Networks

WAN Design

An IP router

IP router - action for each packet

Forwarding is hop by hop

Hop by Hop Forwarding

Router Functions

Forwarding table structure

Encapsulation and Types of Links

Encapsulation (reminder)

Classes of links

Point to point links

Broadcast links

Broadcast links

NBMA links (Non-broadcast multi-access)


Ethernet Essentials

Ethernet/IP Address Resolution

Address Resolution Protocol

ARP Table

ARP Frame

Format of an ARP Message

Types of ARP Messages

ARP Procedure

Reverse ARP - RARP

Home Page: http://www.ws.afnog.org

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